Rotary printing machine



J. MURRAY ROTARY PRINTING momma Filed Dec, 1922 4 sheetsr sheet 1 l/vmw rom- L/UH/V MAW-RA Y r'ns Arromeys J. MURRAY ROTARY PRINTING MACHINE Filed Dec. 29, 1922 4 Sheets-Sheet 2 //v VEN T09.-

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J. MURRAY ROTARY PRINTING MACHINE Filed Dec. 29, 1922 4 Sheets- Sheet 5 @7770 War/"4 Dec, 23, 1924.

J. MURRAY ROTARY PRINTING MACHINE 4 Sheets-Sheet 4 Patented Dec. 23, 1924.

UNITED STATES PATENT OFFICE.

JOHN MURRAY, OF LONDON, ENGLAND.

ROTARY PRINTING MACHINE.

Application filed December 29, 1922.

To all whom it may concern.

Be it known that I, Jonx MURRAY, a British subject, and a resident of London, England, engineer, have invented certain new and useful Improvements in Connection with Rotary Printing Machines, of which the following is the specification.

The invention relates to rotary machines printing from the continuous web, and has for its object to provide improved means for the su port and driving of the reel of paper,

such tiat its insertion in the machine is facilitated and the speed of the unrolling of the web is controlled directly by and in accordance with the speed demanded for its travel by the machine According to the invention there are 31'0- vided two rollers between flanges on w iich the reel is supported on its periphery. The rollers which are arranged with their axes parallel with the axis of the reel, are so proportioned and positioned as to adequately support the reel from beneath against rolling movement. One of the rollers is driven, and by the frictional contact of its peripheral surface with the peripheral surface of the reel. drives the latter at its surface speed. A third roller, pr ferably flanged, weighty or loaded and freely guided vertically, may be applied to the reel vertically above its axis in order to prevent the reel becoming displaced on the lower rollers.

As in certain known wii'iding, unwinding and reeling machines, the speed of this driven roller is regulated, in accordance with the demand of the machine, by means of a jockey pulley arranged in a bight of the web hanging between two horizontal rollers in the machine, which jockey pulley thus rises and falls with variation between the speed at which the web is unreeled and the speed demanded by the machine. The rising and falling jockey roller is operatively connectcd to and controls a variable-speed device through which the reel-driving roller is driven.

The variable-speed device may be of any convenient form but preferably it is of friction-disc-and-pulley type, and according to an illustrative example of this type, there are provided two friction discs lying in the same plane, one operatively connected to and driving the reel-driving roller and the other driven at constant speed from the machine gearing. lVith these friction discs there contact two friction pulleys fast on Serial No. 609,659.

opposite ends of a spindle and carried in a carriage transversable radially to the two discs.

This carriage is operatively connected to the jockey pulley which is in the bight in the web-for example, the jockey pulley may be carried on a forked lever connected by a link to a toothed quadrant operating a rack bar which engages a pinion on a spindle held against endwise movement and screwed to engage, a nut on the carriage.

Means are provided for adjusting the relative position of the carriage-for instance, the nut may be rotatably adjustable in the carriage.

Means are provided for holding the discs in contact with the friction pulleys for instance, by axially applied springs, and means are )rovided for disengaging the reeldriving ro ler from its driving gear.

An example of the carrying out of the invention is shown on four accompanying sheets of drawings in which Figure 1, Sheet 1, Figure 2, Sheet 2, and Figure 3, Sheet 3, are a side elevation, an end elevation, and a plan respectively, while Figures 4 and 5, Sheet 1, show a detail, and Figures 6 and 7, Sheet a, show respectively a sectional plan and a cross-section to an increased scale.

In the example shown there is provided a vertical rod A the lower end of which is supported in a socket A on the base of the rotary machine and the upper end of which isfixed to a bracket C attached to the machine.

()n th rod A is fitted a block A free to slide which carries a pin A with a diso-likc head A whose axis is at right angles to that of the rod A. Upon this pin is carried the reel of paper B.

The bracket C has three bosses C which support, by means of pins C fixed in them, horizontal rollers C free to rotate but prevented from moving endwise. A ockey pulley C* is carried by a pin G supported at each end by a lever C pivoted on a pin C on which there is also pivoted a lever C connected by lever C and link C with the lever C.

A rod (Y is connected to the lever C and is attached to a piston C moving in a cylinder or dash-pot C fitted with an upper cover (1 and a lower cover C provided with a boss free to rotate on a pin C.

A flanged roller A. is carried by a pin A" fixed in a block A freely guided on the rod A. This roller serves to guide the reel of paper now to be described.

A reel of paper B is supported on its periphery by two rollers, one B with flanges between which the reel is held and the other B without flanges but having at one end of it a spur pinion B The rollers B B are "free to rotate on pins B 13 respectively carried by brackets 13 formed on the base of the rotary machine.

The friction discs D and D lie in the same plane and are exactly similar. One D is driven at constant speed from the machine gearing, the other D driving the reeldriving roller B The friction discs D and D are fixed on shafts D which rotate on roller bearings D- and an end thrust roller bearing D all contained in a sleeve D having a cylindrical extension D and a cover plate D The sleeve D is free to slide in a housing D forming part of a bracket D and is operated by a quadrant D fulcruined on a pin D fixed in a gland D connected to the housing D The quadrant D is provided with a slot which embraces a pin D fixed in the extension D of the sleeve D and the movement of the quad ant causes the sleeve to slide in the housing D against the action of a spring D With the friction discs D and D there contact two friction pulleys E consisting of.

frictional material secured to a boss E fixed on opposite ends of a spindle E which rotates on ball bearings E and an end thrust bearing E. These bearings are supported in a carriage E traversable radially to the two discs D and D moving between rollers E fixed in a bracket E rigidly attached to the base of the rotary machine and having rigidly attached to it the bracket D.

The carriage E is provided with a nut E formed at one end as a worm wheel E and provided witha collar E to prevent endwise movement. The nut E may be rotated by turning a worm E gearing with it. A spindle F having a square thread screw at one end engages with the nut E and is fitted at the other end with a pinion F which engages with a rack F arranged to slide vertically in a bracket F secured to the base of the machine.

The bracket F supports the end of the spindle F and also a spindle F carrying at one end a toothed quadrant F operating the rack F and at the other end a lever F connected by a link F to the lever C.

In operation, the reel of paper B is sup ported by its periphery on the rollers B and B whose axes are parallel with the axis of the reel and are so proportioned and -pOS1tlOl1QCl as to permitrolling movement. The reel is rotated by the roller B" which drives it at its own surface speed.

The web B of the reel is passed round the roller which bears continuously on the periphery of the reel and guides it between its flanges, then round two of the rollers C to the jockey pulley C and from it over the remaining horizontal pulley C to the machine.

The speed of the roller B is regulated in accordance with the demand of the inachine by means of the jockey pulley C" arranged in a bight of the web B hanging between the two horizontal rollers C The jockey pulley rises and falls with Va riation between the speed at which the web is unreeled and the speed demanded by the machine. The rising and falling jockey pulley controlled by the dash pot C through the levers C operatively connected to the quadrant F and rack F controls the action of the screwed spindle in the nut E and thus causes the carriage E to traverse radially to the two discs D and D The friction disc D is driven at constant speed by the spindle F of the machine while the speed of the disc D is variable, depend ing on the position of thepulley E bearing on its face. The discs D and D are held in contact with the friction pulleys E by the action of the axially applied springs D and the reel-driving roller B is stopped by disengaging the disc D from the pulley E by means of the quadrant D lVhat I claim is:

1. In connection with rotary printing mat-- chines, paper reel driving mechanism comprising a reel, two rollers, one having flanges, both lying parallel with the axis of the reel and supporting it by its periphery, means for driving one of said rollers, and a jockey pulley in a bight in the web, in combination with means for varying the speed of drive from said ockey pulley, said means including a driving and a driven friction disc on parallel axes and side by side, a

shaft at right angles to and cutting the axes of the discs and a pair of friction pulleys on said shaftand engaging said discs on opposite sides of their centers, means for maintaining the pulleys in driving contact with the disc and means operated from the said jockey pulley for moving said. friction pulleys radially upon the disc, comprising levers carr 1112 the ockev )ulle a Jivoted .l 7

quadrant, a link connecting the levers to the quadrant. a double rack engaged by the quadrant, a shaft having screw threads thereon and a pinion on said shaft engaged by said double rack, a nut engaging said screw threads, and a casing carrying the friction pulleys in which said nut is fixed movable radially to the friction discs.

2. In connection with rotary printing machines, paper reel driving mechanisi'n comprising a reel. two rollers. one having fiangesnboth lying parallel with the axis of the reel and supporting it by its periphery,

in combination with a third roller guided vertically and bearing on the upper part of the periphery of the reel; means for varying;

the speed of drive from said jockey pulley, said means including a driving and a driven friction disc on parallel axes and side by side, a shaft at right angles to and cutting the axes of the discs and a pair of friction pulleys on said shaft and engaging said discs on opposite sides of their centers, means for maintaining the pulleys 1n driving contact with the disc and means operated froin the said ockey pulley for moving the pulleys radially upon the dlscs.

In testnnony whereof I have signed my name to tlns specification.

JOHN MURRAY. 

